#3 cylinder dead

[korvettekarl]

Took the Z out today and ten minutes into the drive a cylinder stopped firing. Got it home and pulled the plug wires one at a time and #3 seems to not be firing. Changed plugs and same results. Pulled plug and cranked it with the plug grounded to plenum and seems to be firing. Any suggestions?

 

[90 Corvette ZR-1]

possible dead injector. does the car sit a lot?

 

[korvettekarl]

Yes it does. Compression was 160.

 

[90 Corvette ZR-1]

Yes it does. Compression was 160.

check the ohms on the injectors

 

[Jeffvette]

How does the plug on Cylinder #2 look?

 

[korvettekarl]

All the plugs looked good. #3 was not wet which leads me to believe the injector is not functioning.

 

[90 Corvette ZR-1]

the injectors are not hard to replace, but I would suggest that you take a reading of the ohms on all the injectors.

 

[Jeffvette]

All the plugs looked good. #3 was not wet which leads me to believe the injector is not functioning.

Just checking on the coil, as 2 & 3 are shared. Sounds like a possible injector issue. If you do service them, do not clean them. They are a PITA after they get done. Just buy two new ones for that cylinder and be done with it.

 

[korvettekarl]

Thanks evrybody. I will get around to changing the injectors as soon as I finish a Fuel injection install on a friends 57 Bel Air.

 

[90 Corvette ZR-1]

any updates?

 

[Rob]

Are you sure there is enough of a charge getting to the plug???

 

[korvettekarl]

I finally got the parts to pull the plenum and replace the injectors. I will get to that as soon as I finish with a 57 Bel Air I doing for a friend. I ran into a few problems with it. I am installing a Edelbrock Pro-Flo fuel injection for him. Thanks to everbody for the invaluable advice. When complete I will let everybody know.